# a=b=10
# print(a)
# print(b)

# a = 10
# b = 20
#
# tmp = a
# a = b
# b = tmp


a = 10
b = 20
a,b=b,a
print(a,b)

# a = 10
# a = a + 1
# print(a)
#
# b = 10
# b += 1
# print(b)